Could you show me where that point was raised in this thread and the post you were responding to with that one?
I don't think Christians say that God Himself physically wrote the Bible. Not sure where you read anyone saying Christians make that claim you are asserting, that's not what they teach.
It sounds like you are just trying to make a case that Biblical Christianity is bad and whatever religion you approve of is good. That's okay, but just be upfront from the beginning.
Why don't you go back and read the entire conversation between the two posters?